Moving picture coding device, moving picture coding method, moving picture, coding program, moving picture decoding device, moving picture decoding method, and moving picture decoding program

Abstract

A merging motion information candidate generation unit derives, when information indicating whether or not to derive a merging motion information candidate shared for all prediction blocks in a coding block is information indicating the derivation of a merging motion information candidate shared for all the prediction blocks in the coding block, a plurality of merging motion information candidates shared for all the prediction blocks in the coding block. A merging motion information selection unit selects one merging motion information candidate from the plurality of merging motion information candidates and uses the selected merging motion information candidate in a prediction block subject to coding.

What is claimed is: 
     
       1. A moving picture decoding device adapted to decode a decoding block consisting of two prediction blocks, comprising:
 a decoding unit configured to decode an index from a bitstream, the index is specifying a merging motion information candidate used in a prediction block subject to decoding; 
 a merging motion information candidate list generation unit configured to generate a merging motion information candidate list including a plurality of merging motion information candidates for all the prediction blocks in the decoding block using candidate blocks not neighboring the prediction block but neighboring the decoding block, when a size of the decoding block is smaller than a threshold size; 
 a merging motion information selection unit configured to select one merging motion information candidate from the merging motion information candidate list based on the index; and 
 a processing unit including the decoding unit, the merging motion information candidate list generation unit, and the merging motion information selection unit. 
 
     
     
       2. A moving picture decoding method adapted to decode a decoding block consisting of two prediction blocks, comprising:
 decoding an index from a bitstream, the index is specifying a merging motion information candidate used in a prediction block subject to decoding; 
 generating a merging motion information candidate list including a plurality of merging motion information candidates for all the prediction blocks in the decoding block using candidate blocks not neighboring the prediction block but neighboring the decoding block, when a size of the decoding block is smaller than a threshold size; and 
 selecting one merging motion information candidate from the merging motion information candidate list based on the index. 
 
     
     
       3. A non-transitory computer-readable recording medium having embodied thereon a moving picture decoding program adapted to decode a decoding block consisting of two prediction blocks, the moving picture decoding program causing a computer to execute:
 decoding an index from a bitstream, the index is specifying a merging motion information candidate used in a prediction block subject to decoding; 
 generating a merging motion information candidate list including a plurality of merging motion information candidates for all the prediction blocks in the decoding block using candidate blocks not neighboring the prediction block but neighboring the decoding block, when a size of the decoding block is smaller than a threshold size; and 
 selecting one merging motion information candidate from the merging motion information candidate list based on the index.